You can choose what happens when you click on the desktop using your pointing device's middle button: No action Window list menu: a menu showing all windows on all virtual desktops pops up. You can click on the desktop name to switch to that desktop, or on a window name to shift focus to that window, switching desktops if necessary, and restoring the window if it is hidden. Hidden or minimized windows are represented with their names in parentheses. Desktop menu: a context menu for the desktop pops up. Among other things, this menu has options for configuring the display, locking the screen, and logging out of KDE. Application menu: the "K" menu pops up. This might be useful for quickly accessing applications if you like to keep the panel hidden from view.
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